Zoanthid Pest Identification

[ReefSoup]

Looking for help identifying what this is on my zoas. This is the first time I’ve ever seen them in the tank. Is this some type of nudibranch? Thanks in advance!
[HASH=1]#reefsquad[/HASH]

 

[ScottR]

That looks like a sponge to me. Not completely sure. But a FW dip or a dip with H2O2 should take care of it if so.

 

[SifuMemphis]

Looks like a sponge. The image you posted, top right side, also looks like Hydroids to me. Something to look into

 

[makingitwork]

Hard to identify from this image alone, regardless if you can remove the rock from the tank and carefully dip the coral. Even if it isn't a parasite a propper dip treatment is a safe bet

 

[ReefSoup]

Looks like a sponge. The image you posted, top right side, also looks like Hydroids to me. Something to look into

Definitely hydroids, I’ve been dealing with them on and off. I’ll have them for a period, then they disappear. Haven’t quite figured out what’s causing them.

 

[SifuMemphis]

Definitely hydroids, I’ve been dealing with them on and off. I’ll have them for a period, then they disappear. Haven’t quite figured out what’s causing them.

Yup... me either. Randomly see them, then it disappears then reappears.

 

[samnaz]

I’ve read that type of white branching sponge can be an invasive pest. Looks like what you have here.